标题: 线性电源绕开CEC要求的方法 [打印本页] 作者: tigerzen2008 时间: 2008-2-28 17:14 标题: 线性电源绕开CEC要求的方法 大家能否讨论一下: 线性电源绕开CEC要求的方法. 9 ~5 v0 }9 J( I! A9 d
譬如,次级采用双绕组, 能有效避开CEC要求吗? + P5 H. F/ n! F4 r. ~# x
引用: 7 {0 D1 x4 G: {4 W+ z- f6 t+ b
These Standards apply to each single-voltage external AC to DC, or AC to AC power supply : i& C7 S0 X6 Y/ H; o8 r# ^that meets the following conditions: " {" q" p% Q2 @7 V' }# }1. is designed to convert line voltage AC input into lower voltage DC or AC output; $ s* Y9 X; [) K! `2 m2. is able to convert to only one DC or AC output voltage at a time;0 Q2 r7 B& A) s. Z1 g. p/ r
3. is sold with, or intended to be used with, a separate end-use product that ; @) G; o! }) O# aconstitutes the primary load; |* H& z+ g8 r2 j
4. is contained within a separate physical enclosure from the end-use product; 0 Z; }: d7 v& s; G0 x D5. is connected to the end-use product via a removable or hard-wired male/female7 n }& b( Y$ K$ D* f% o
electrical connection, cable, cord, or other wiring; , V( T4 X5 N1 L7 _$ A. {/ n7 d6. does not have batteries or battery packs that physically attach directly (including0 J, P$ p% r- N* T) B
those that are removable) to the power supply unit; 9 _+ b& x7 P4 ^7. does not have a battery chemistry or type selector switch and an indicator light; H) X- }& j: {4 ]+ h5 z
or, does not have a battery chemistry or type selector switch and a state of 9 W- ]! v9 B2 J' E0 Vcharge meter;1 a# o$ l. Q# S \( d4 e
8. has a nameplate output power less than or equal to 250 watts.作者: quake 时间: 2008-3-4 23:00
这句话不是说只有一路电源输出,而是一次只是变换一个直流或交流电压,类似于一次电源的意思. - _: \ v- \( A% O4 q) T+ l: G比如你用线性变压器把AC220变成AC30,再经过稳压电路或又DC-DC变换器变成12V就不是标准适用的电源,虽然你可能最终输出只有一个电压.$ t! ?4 O4 U5 ~; G
我个人的理解.作者: qinhx 时间: 2008-3-8 11:06
这个地方颇有争议,8 m9 E d" }1 P g9 @
我做MEPS认证时,和Testing&Certification Australia的工程师沟通时,他们也没有办法确定;作者: tigerzen2008 时间: 2008-3-11 14:03
我无法理解二楼的话. 3 E9 b2 U: h, O( x引用:"比如你用线性变压器把AC220变成AC30,再经过稳压电路或又DC-DC变换器变成12V就不是标准适用的电源,虽然你可能最终输出只有一个电压."- u& [1 n5 R) J4 A! |
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如此的经过线性电源得到的DC电压是否都不适用此标准呢? 如只经过简单的整流. 7 N0 h8 V9 {2 _! I) \ # V. h9 }, S/ @1 I9 ]9 e有高人可以解答吗/& X+ z7 B1 i3 `' X2 @* a
谢谢!作者: 冰火焰情 时间: 2008-3-11 15:30
正如楼主说的2.条，CEC只针对单组输出，如果楼主做双绕组是可以不用做的。